[jira] [Updated] (FLINK-19822) Remove redundant shuffle for streaming

["Jingsong Lee (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-19822?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jingsong Lee updated FLINK-19822:
---------------------------------
        Parent:     (was: FLINK-19621)
    Issue Type: Improvement  (was: Sub-task)

> Remove redundant shuffle for streaming
> --------------------------------------
>
>                 Key: FLINK-19822
>                 URL: https://issues.apache.org/jira/browse/FLINK-19822
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table SQL / Planner
>            Reporter: godfrey he
>            Priority: Major
>              Labels: auto-unassigned, pull-request-available
>
> This is similar [FLINK-12575|https://issues.apache.org/jira/browse/FLINK-12575], we could implement {{satisfyTraits}} method for stream nodes to remove redundant shuffle. This could add more possibilities that more operators can be merged into multiple input operator.
> Different batch, stream operators require the shuffle keys and the state keys must be exactly the same, otherwise the state may be not correct.
> We only support a few operators in this issue, such as Join and regular Aggregate. Other operators will be supported in the future.



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